Harry Potter merchandise are on display at the Scholastic Store November 16, 2001 in New York, NY. (Photo by Justin Sullivan/Getty Images)

A child looks at a Harry Potter product December 13, 2002 in London, England. Harry Potter merchandise to be one of the best-selling gifts for the 2002 Christmas season. (Photo by Scott Barbour/Getty Images)

Actors Emma Watson, Daniel Radcliff and Rupert Grint attend a photocall for the movie “Harry Potter and the Chamber of Secrets” at the Guildhall October 25, 2002 in London, United Kingdom. (Photo by Dave Hogan/Getty Images)

Eight year old Mason Hoppe waits for his chance to purchase a copy of the new “Harry Potter and the Order of the Phoenix” book by J.K. Rowling at Barnes and Noble bookstore on June 21, 2003 in Schaumburg, Illinois. (Photo by Scott Olson/Getty Images)

Actors Emma Watson, Rupert Grint and Daniel Radcliffe attend a photocall to present the new cast of the Harry Potter Films, London, August 23, 2000. (Photo by Dave Hogan/Getty Images)

Harry Potter author JK Rowling arrives at Edinburgh Castle where she will read passages from the sixth magical children's title “Harry Potter And The Half-Blood Prince”, on July 15, 2005 in Edinburgh, Scotland. (Photo by Christopher Furlong/Getty Images)

(L to R) Actors Rupert Grint, Emma Watson and Daniel Radcliffe arrive at the World Premiere of “Harry Potter And The Goblet Of Fire” at the Odeon Leicester Square on November 6, 2005 in London, England. (Photo by Dave Hogan/Getty Images)

(L-R) Actors Daniel Radcliffe and Ralph Fiennes attend the premiere of “Harry Potter and the Goblet of Fire” on November 12, 2005 in New York City. (Photo by Peter Kramer/Getty Images)

Actors Daniel Radcliffe and Emma Watson arrive at the Sony Ericsson Empire Film Awards 2006, the annual awards show voted for by the public, at the Hilton London Metropole on March 13, 2006 in London, England. (Photo by Dave Hogan/Getty Images)

Actor Rupert Grint meets fans at the european premiere of “Harry Potter And The Order Of The Phoenix” at Odeon Leicester Square on July 3, 2007 in London, England. (Photo by Dave Hogan/Getty Images)

A Borders books customer walks by a sign advertising the new Harry Potter book at a Borders store July 19, 2007 in San Francisco, California. (Photo by Justin Sullivan/Getty Images)

Harry Potter fan Hanna Polasky looks on in the Union Square Barnes and Noble before the final book goes on sale tonight at midnight July 20, 2007 in New York City. (Photo by Mario Tama/Getty Images)

A Harry Potter fan begins to read the final novel by author J.K. Rowling, “Harry Potter and the Deathly Hallows”, at the much anticipated launch on July 21, 2007 at the Carriage Works in Sydney Australia. (Photo by Lisa Maree Williams/Getty Images)

(L-R) Daniel Radcliffe, Emma Watson, J K Rowling and Rupert Grint attend the World Premiere of “Harry Potter And The Deathly Hallows: Part 1” held at The Odeon Leicester Square on November 11, 2010 in London, England. (Photo by Dave Hogan/Getty Images)